completed story 1.1 with QA tests and fixes

app/Models/Post.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace App\Models;
+
+use App\Enums\PostStatus;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Post extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'title',
+        'body',
+        'status',
+        'published_at',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'title' => 'array',
+            'body' => 'array',
+            'status' => PostStatus::class,
+            'published_at' => 'datetime',
+        ];
+    }
+
+    /**
+     * Scope to filter published posts.
+     */
+    public function scopePublished($query)
+    {
+        return $query->where('status', PostStatus::Published);
+    }
+
+    /**
+     * Scope to filter draft posts.
+     */
+    public function scopeDraft($query)
+    {
+        return $query->where('status', PostStatus::Draft);
+    }
+
+    /**
+     * Get the title in the specified locale, with fallback to Arabic.
+     */
+    public function getTitle(?string $locale = null): string
+    {
+        $locale ??= app()->getLocale();
+
+        return $this->title[$locale] ?? $this->title['ar'] ?? '';
+    }
+
+    /**
+     * Get the body in the specified locale, with fallback to Arabic.
+     */
+    public function getBody(?string $locale = null): string
+    {
+        $locale ??= app()->getLocale();
+
+        return $this->body[$locale] ?? $this->body['ar'] ?? '';
+    }
+}